CN113105812B - Negative ion environment-friendly coating and preparation method thereof - Google Patents
Negative ion environment-friendly coating and preparation method thereof Download PDFInfo
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- CN113105812B CN113105812B CN202110404315.2A CN202110404315A CN113105812B CN 113105812 B CN113105812 B CN 113105812B CN 202110404315 A CN202110404315 A CN 202110404315A CN 113105812 B CN113105812 B CN 113105812B
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- 238000000576 coating method Methods 0.000 title claims abstract description 62
- 239000011248 coating agent Substances 0.000 title claims abstract description 58
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 109
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 40
- 150000002500 ions Chemical class 0.000 claims abstract description 39
- 229910052797 bismuth Inorganic materials 0.000 claims abstract description 38
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims abstract description 38
- 150000001450 anions Chemical class 0.000 claims abstract description 27
- 239000011941 photocatalyst Substances 0.000 claims abstract description 24
- 239000000843 powder Substances 0.000 claims abstract description 22
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 21
- 239000002131 composite material Substances 0.000 claims abstract description 17
- 239000003822 epoxy resin Substances 0.000 claims abstract description 16
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 16
- 238000002156 mixing Methods 0.000 claims abstract description 14
- 239000002270 dispersing agent Substances 0.000 claims abstract description 12
- 239000000725 suspension Substances 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 238000001914 filtration Methods 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims description 18
- 239000000243 solution Substances 0.000 claims description 16
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 14
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 14
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 12
- 238000004132 cross linking Methods 0.000 claims description 12
- 238000001027 hydrothermal synthesis Methods 0.000 claims description 12
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 10
- 229910052799 carbon Inorganic materials 0.000 claims description 10
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 claims description 10
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 9
- RYSXWUYLAWPLES-MTOQALJVSA-N (Z)-4-hydroxypent-3-en-2-one titanium Chemical compound [Ti].C\C(O)=C\C(C)=O.C\C(O)=C\C(C)=O.C\C(O)=C\C(C)=O.C\C(O)=C\C(C)=O RYSXWUYLAWPLES-MTOQALJVSA-N 0.000 claims description 8
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 8
- 229910017604 nitric acid Inorganic materials 0.000 claims description 8
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 239000010936 titanium Substances 0.000 claims description 6
- 229910052719 titanium Inorganic materials 0.000 claims description 6
- YHWCPXVTRSHPNY-UHFFFAOYSA-N butan-1-olate;titanium(4+) Chemical compound [Ti+4].CCCC[O-].CCCC[O-].CCCC[O-].CCCC[O-] YHWCPXVTRSHPNY-UHFFFAOYSA-N 0.000 claims description 5
- 235000019441 ethanol Nutrition 0.000 claims description 5
- 229920001296 polysiloxane Polymers 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 3
- 229910002651 NO3 Inorganic materials 0.000 claims description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 2
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 abstract description 63
- 230000000694 effects Effects 0.000 abstract description 17
- -1 oxygen ion Chemical class 0.000 abstract description 13
- 238000004887 air purification Methods 0.000 abstract description 11
- 229910052760 oxygen Inorganic materials 0.000 abstract description 7
- 239000001301 oxygen Substances 0.000 abstract description 7
- 239000004566 building material Substances 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 31
- 238000005260 corrosion Methods 0.000 description 13
- 230000007797 corrosion Effects 0.000 description 12
- 238000000746 purification Methods 0.000 description 12
- 239000003973 paint Substances 0.000 description 11
- 230000009286 beneficial effect Effects 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 10
- 150000001721 carbon Chemical class 0.000 description 9
- 239000000839 emulsion Substances 0.000 description 9
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 7
- 239000004810 polytetrafluoroethylene Substances 0.000 description 7
- 239000012855 volatile organic compound Substances 0.000 description 7
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(III) oxide Inorganic materials O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 description 5
- 238000000354 decomposition reaction Methods 0.000 description 5
- 239000008367 deionised water Substances 0.000 description 5
- 229910021641 deionized water Inorganic materials 0.000 description 5
- 239000012265 solid product Substances 0.000 description 5
- 238000001179 sorption measurement Methods 0.000 description 5
- 239000004971 Cross linker Substances 0.000 description 3
- 239000002518 antifoaming agent Substances 0.000 description 3
- 239000002519 antifouling agent Substances 0.000 description 3
- 239000011247 coating layer Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- 229920002635 polyurethane Polymers 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 238000009736 wetting Methods 0.000 description 3
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 2
- 125000000129 anionic group Chemical group 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 230000001699 photocatalysis Effects 0.000 description 2
- 238000007146 photocatalysis Methods 0.000 description 2
- 230000003405 preventing effect Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 229910000077 silane Inorganic materials 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002318 adhesion promoter Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 229910052747 lanthanoid Inorganic materials 0.000 description 1
- 150000002602 lanthanoids Chemical class 0.000 description 1
- 230000004298 light response Effects 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical group O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052613 tourmaline Inorganic materials 0.000 description 1
- 229940070527 tourmaline Drugs 0.000 description 1
- 239000011032 tourmaline Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
- C09D4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
- Catalysts (AREA)
Abstract
The application relates to the technical field of building material coatings, and particularly discloses an anion environment-friendly coating and a preparation method thereof. The negative ion environment-friendly coating is prepared from the following raw materials in parts by weight: 40-70 parts of water-based epoxy resin, 5-15 parts of mixed cross-linking agent, 5-20 parts of anion powder, 5-10 parts of bismuth-based-activated carbon photocatalyst, 1-4 parts of dispersing agent and 50-100 parts of water; the preparation method comprises the following steps: firstly, uniformly mixing anion powder, a bismuth-based-activated carbon photocatalyst and water to obtain a suspension; adding the mixed cross-linking agent into the suspension, reacting for 5-8h at 65-75 ℃, and filtering to obtain the bismuth-based-anion-activated carbon composite material; then adding the bismuth-based-anion-activated carbon composite material and the dispersing agent into the water-based epoxy resin, and uniformly mixing to obtain the anion environment-friendly coating. The application discloses anion environmental protection coating not only has release negative oxygen ion, anticorrosive effect, can continuously adsorb and decompose free formaldehyde in the air moreover, has improved the air purification effect of coating.
Description
Technical Field
The application relates to the technical field of building material coatings, in particular to an anion environment-friendly coating and a preparation method thereof.
Background
The negative ion coating contains negative ion powder, the negative ion powder is generally composite mineral powder synthesized by tourmaline powder and lanthanide according to a proportion, the negative ion powder can ionize air to generate negative oxygen ions, the sleeping quality of a resident is improved, and meanwhile, the negative oxygen ions also have the effect of purifying formaldehyde. Therefore, the anion paint is an environment-friendly paint which can improve the living environment. The negative ion coating can be coated on a wall body and can also be coated on furniture.
In the related technology, the patent with the publication number of CN105602401B discloses a water-based environment-friendly anion anticorrosive paint and a preparation method thereof, wherein the paint comprises, by mass, 20-40% of a water-based epoxy resin emulsion, 10-20% of a water-based polyurethane emulsion, 5-10% of a water-based fluororesin emulsion, 10-15% of a water-based nano anion slurry, 1-3% of a water-based wetting dispersant, 0.1-1% of a water-based defoaming agent, 1-3% of an adhesion promoter, 5-10% of a lead-free antirust pigment, 0.5-2.5% of an antifouling agent, 5-10% of a film-forming assistant and 5-25% of deionized water. The paint can generate negative oxygen ions and has an anti-corrosion function.
In view of the above-mentioned related arts, the inventors believe that formaldehyde in the air is in a free state, and the adsorption of the above-mentioned coating to free formaldehyde is weak, which is not favorable for improving the air purification effect of the coating.
Disclosure of Invention
In order to improve the purification effect of the coating on free formaldehyde in air, the application provides an anion environment-friendly coating and a preparation method thereof.
In a first aspect, the application provides an environment-friendly negative ion coating, which adopts the following technical scheme: an anion environment-friendly coating is prepared from the following raw materials in parts by weight: 40-70 parts of water-based epoxy resin, 5-15 parts of mixed cross-linking agent, 5-20 parts of anion powder, 5-10 parts of bismuth-based-activated carbon photocatalyst, 1-4 parts of dispersing agent and 50-100 parts of water.
By adopting the technical scheme, as the mixed cross-linking agent, the anion powder and the bismuth-based-activated carbon photocatalyst are adopted, and the mixed cross-linking agent cross-links the anion powder and the bismuth-based-activated carbon photocatalyst together, so that the bismuth-based-activated carbon photocatalyst is loaded on the negative ion powder to generate a bismuth-based-negative ion-activated carbon composite material, the activated carbon in the bismuth-based-negative ion-activated carbon composite material can adsorb free formaldehyde in the air, the negative oxygen ions generated by the bismuth-based-negative ion-activated carbon composite material promote the decomposition of the formaldehyde, meanwhile, the bismuth-based photocatalyst in the bismuth-based negative ion-activated carbon composite material accelerates the decomposition and adsorption of formaldehyde under visible light, and is beneficial to improving the continuous adsorption and decomposition capacity of the bismuth-based negative ion-activated carbon composite material;
in addition, the dosage of the water-based epoxy resin is far greater than that of the mixed cross-linking agent, which is beneficial to reducing the adverse effect of the mixed cross-linking agent on the corrosion resistance of the coating;
therefore, the negative ion environment-friendly coating not only has the effects of releasing negative oxygen ions and preventing corrosion, but also can continuously adsorb and decompose free formaldehyde in the air, and improves the air purification effect of the coating.
Preferably, the negative ion environment-friendly coating is prepared from the following raw materials in parts by weight: 50-60 parts of water-based epoxy resin, 9-11 parts of mixed cross-linking agent, 12-14 parts of anion powder, 6.5-8.5 parts of bismuth-based-activated carbon photocatalyst, 2-3 parts of dispersing agent and 70-80 parts of water.
By adopting the technical scheme, the prepared coating has higher adsorption and decomposition speeds on formaldehyde in the proportion, and the air purification effect of the coating is further improved.
Preferably, the bismuth-based-activated carbon photocatalyst is Bi2O3Activated carbon or Bi2O3-TiO2One or two of the compositions in the active carbon.
By adopting the technical scheme, compared with TiO2Photocatalysts of uniform wide band gap, Bi2O3And Bi2O3-TiO2The band gaps are narrow, the response to visible light is good, and the photocatalysis effect can be better exerted indoors, so that Bi is adopted2O3Activated carbon or Bi2O3-TiO2Activated carbon, both contribute to the decomposition of formaldehyde indoors.
Preferably, said Bi2O3-TiO2The preparation method of the active carbon comprises the following steps,
(1) uniformly mixing 1-2 parts by weight of tetrabutyl titanate and 3-5 parts by weight of absolute ethyl alcohol to obtain a titanium-containing solution;
(2) under the condition of stirring, adding 1-2 parts by weight of nano activated carbon into a titanium-containing solution, and uniformly mixing to obtain a mixed solution;
(3) uniformly mixing 1-2 parts by weight of 2.5% nitric acid solution and 1-2 parts by weight of absolute ethyl alcohol to obtain a nitric acid alcohol solution;
(4) under the condition of stirring, adding nitric acid alcoholSolution and 1-2 parts by weight of Bi (NO)3)·5H2Adding O into the mixed solution, and stirring for 30-90min to obtain sol;
(5) adding the sol into a hydrothermal reaction kettle, heating the hydrothermal reaction kettle for 22-26h at the temperature of 110-2O3-TiO2Active carbon.
By adopting the technical scheme, tetrabutyl titanate, nano activated carbon and Bi (NO) are firstly added3)·5H2O is dispersed in the solution, which is beneficial to the uniform mixing of reactants at a molecular level and the chemical reaction; the hydrothermal reaction kettle is adopted to heat the sol, the reaction condition is mild, and the reaction process is safer.
Preferably, the mixed crosslinking agent comprises a crosslinking substance and ammonium persulfate, the weight ratio of the crosslinking substance to the ammonium persulfate is (4-5):1, and the crosslinking substance is one of toluene diisocyanate or titanium acetylacetonate.
By adopting the technical scheme, the ammonium persulfate is beneficial to initiating a crosslinking reaction, the toluene diisocyanate or the titanium acetylacetonate can load the bismuth-based-activated carbon photocatalyst on the anion powder, and meanwhile, as the waterborne epoxy resin contains secondary hydroxyl, the toluene diisocyanate or the titanium acetylacetonate and the secondary hydroxyl are subjected to the crosslinking reaction, the coating is beneficial to being attached on a base material, the scratch resistance of a coating film of the coating can be improved, and the damage of the coating after film forming is reduced.
Preferably, the negative ion environment-friendly coating also comprises 4-8 parts by weight of water-based acrylic acid.
By adopting the technical scheme, the water-based acrylic acid can increase the oxygen-containing group and the specific surface area on the surface of the activated carbon, is beneficial to enhancing the adsorbability of the bismuth-based activated carbon photocatalyst and improving the adsorption effect of the coating on formaldehyde; and the waterborne acrylic acid contains carboxyl, toluene diisocyanate or titanium acetylacetonate can generate crosslinking reaction with the carboxyl, and the generated crosslinking product can enhance the weather resistance of the coating.
Preferably, the negative ion environment-friendly coating also comprises 3-6 parts by weight of epoxy-terminated organosilicon.
By adopting the technical scheme, the epoxy-terminated organosilicon has strong hydrophobic property, and part of the epoxy-terminated organosilicon is enriched on the surface of the coating layer, so that the contact angle between water and the coating layer is increased, the waterproof property of the coating is enhanced, corrosive media are reduced from invading into the coating layer, and the corrosion resistance of the coating is further enhanced.
In a second aspect, the application provides a preparation method of an anion environment-friendly coating, which adopts the following technical scheme:
the preparation method of the negative ion environment-friendly coating comprises the following preparation steps
S1, uniformly mixing the anion powder, the bismuth-based activated carbon photocatalyst and water according to the proportion to obtain a suspension;
s2, adding the mixed cross-linking agent into the suspension, reacting for 5-8h at 65-75 ℃, and filtering to obtain the bismuth-based-anion-activated carbon composite material;
s3, adding the bismuth-based negative ion-activated carbon composite material and the dispersing agent into the water-based epoxy resin, and uniformly mixing to obtain the negative ion environment-friendly coating.
By adopting the technical scheme, the anion powder and the bismuth-based-activated carbon photocatalyst are dispersed in water, which is beneficial to carrying out crosslinking reaction; the method has the advantages of mild reaction conditions, simple operation, safety and high efficiency.
Preferably, in the step of S1, 4-8 parts by weight of aqueous acrylic acid is also added, and the mixture is reacted for 1.5-2.5h at 50-70 ℃ to obtain a suspension.
By adopting the technical scheme, the water-based acrylic acid is added firstly, and then the mixed cross-linking agent is added, which is beneficial to reducing the consumption of the water-based acrylic acid.
Preferably, in the step of S3, 3 to 6 parts by weight of epoxy-terminated silicone is further added.
By adopting the technical scheme, the epoxy-terminated organic silicon and the water-based epoxy resin are uniformly mixed, so that the epoxy-terminated organic silicon is uniformly distributed in the coating, and the corrosion resistance of the coating is improved.
In summary, the present application has the following beneficial effects:
1. because the mixed cross-linking agent, the anion powder and the bismuth-based-activated carbon photocatalyst are adopted, the bismuth-based-anion-activated carbon composite material is generated, free formaldehyde in air can be continuously adsorbed and decomposed, and the air purification effect of the coating is improved;
2. bi is preferably used in the present application2O3Activated carbon or Bi2O3-TiO2Activated carbon due to Bi2O3And Bi2O3-TiO2The photocatalyst has good light response to visible light, and is favorable for better photocatalysis indoors;
3. according to the method, the bismuth-based-anion-activated carbon composite material is formed through a crosslinking reaction, and then the bismuth-based-anion-activated carbon composite material is mixed with the water-based epoxy resin, so that the consumption of the mixed crosslinking agent in the water-based epoxy resin is reduced.
Detailed Description
The starting materials in the examples of the present application are all commercially available. Wherein tetrabutyl titanate is purchased from Nantong Runfeng petrochemical company, anion powder is purchased from Hebei Wao Peak mineral products, Inc., toluene diisocyanate is purchased from Shandong Liang New Material science and technology, Inc., the dispersing agent is 5040 purchased from Nantong Runfeng petrochemical company, titanium acetylacetonate is purchased from Yunnan Lilian biology, Inc., and epoxy-terminated organosilicon is purchased from Shanghai Chuyi good organosilicon materials, Inc.
The present application will be described in further detail with reference to examples.
Preparation examples of raw materials
Preparation example 1
Bi2O3Activated carbon prepared according to the following steps: 1.5kg of 2.5% nitric acid solution and 1.5kg of anhydrous ethanol were added to a stirrer, and after stirring at 300r/min for 30min, 1.5kg of Bi (NO) was added3)·5H2Adding O into a stirrer, stirring for 50min at the speed of 400r/min to obtain transparent sol, putting the transparent sol into a polytetrafluoroethylene inner container of a hydrothermal reaction kettle, putting the polytetrafluoroethylene inner container into the hydrothermal reaction kettle, moving the hydrothermal reaction kettle into an oven, reacting for 24h at the temperature of 120 ℃, taking out the reaction kettle, centrifugally separating liquid in the polytetrafluoroethylene inner container to obtain a solid product, putting the solid product into an oven, drying for 6h at the temperature of 80 ℃, grinding the solid product to obtain Bi2O3Active carbon.
Preparation example 2
Bi2O3-TiO2Activated carbon prepared according to the following steps:
(1) adding 1.5kg of tetrabutyl titanate and 4kg of absolute ethyl alcohol into a stirrer, and stirring for 15min at 200r/min to obtain a titanium-containing solution;
(2) adding 1.5kg of nano activated carbon into the titanium-containing solution at 300r/min, and stirring for 15min to obtain a mixed solution;
(3) uniformly mixing 1.5kg of 2.5% nitric acid solution and 1.5kg of absolute ethyl alcohol to obtain a nitric acid alcohol solution;
(4) adding alcohol nitrate solution and 1.5kg of Bi (NO) under stirring at 400r/min3)·5H2Adding O into the mixed solution, and stirring for 60min to obtain sol;
(5) adding the sol into a polytetrafluoroethylene inner container of a hydrothermal reaction kettle, filling the polytetrafluoroethylene inner container into the hydrothermal reaction kettle, moving the hydrothermal reaction kettle into a drying oven, heating the hydrothermal reaction kettle for 24 hours at 120 ℃, taking out the polytetrafluoroethylene inner container, separating liquid in the polytetrafluoroethylene inner container to obtain a solid product, drying and grinding the solid product to obtain Bi2O3-TiO2Active carbon.
Examples
Examples 1 to 7
As shown in Table I, examples 1-7 differ mainly in the ratios of the raw materials.
The following description will be given by taking example 1 as an example.
Example 1
An anion environment-friendly coating is prepared by the following steps:
s1, adding the anion powder, the bismuth-based activated carbon photocatalyst and water into a stirrer according to the proportion, and stirring for 15min at 200r/min to obtain a suspension;
s2, adding the mixed cross-linking agent into the suspension, reacting for 6.5h at a constant temperature under the condition of 70 ℃ oil bath, and then filtering the liquid to obtain the bismuth-based-anion-activated carbon composite material;
s3, adding the bismuth-based negative ion-activated carbon composite material, the dispersing agent and the water-based epoxy resin into a stirrer, and stirring for 30min at 200r/min to obtain the negative ion environment-friendly coating.
Wherein the mixed cross-linking agent comprises toluene diisocyanate and ammonium persulfate, and the bismuth-based-activated carbon photocatalyst is Bi2O3-TiO2Active carbon.
TABLE proportioning of the raw materials of examples 1-7
Example 8
This example is different from example 5 in that Bi is added2O3-TiO2Replacement of activated carbon by equal amount of Bi2O3Active carbon.
Example 9
This example is different from example 5 in that the bismuth-based-activated carbon photocatalyst of this example is 3.75/kg Bi2O3Activated carbon and 3.75/kg Bi2O3-TiO2Activated carbon mixture.
Example 10
This example differs from example 5 in that toluene diisocyanate was replaced with an equal amount of titanium acetylacetonate.
Example 11
This example differs from example 5 in that in step S1, 6kg of aqueous acrylic acid was simultaneously added to a stirrer, stirred at 200r/min for 15min and heated at 60 ℃ for 2h to give a suspension.
Example 12
This example is different from example 5 in that 4.5kg of epoxy-terminated silicone was simultaneously added to a stirrer and stirred at 200r/min for 30min in step S3 to obtain an anionic eco-friendly coating.
Example 13
This example is different from example 11 in that 4.5kg of epoxy-terminated silicone was simultaneously added to a stirrer and stirred at 200r/min for 30min in step S3 to obtain an anionic eco-friendly coating.
Comparative example
Comparative example 1
An aqueous environment-friendly negative ion anticorrosive paint is prepared by the following steps of dripping aqueous epoxy resin emulsion into aqueous polyurethane emulsion according to the proportion of table two, stirring and dispersing for 5-10min, then dripping aqueous fluororesin emulsion, stirring and dispersing for 5-10min, dripping the prepared aqueous nano negative ion slurry, stirring and dispersing for 15-30min, then adding deionized water accounting for 5-10% of the total mass of the deionized water into a dispersion cylinder, stirring for 20-30min at the rotation speed of 400-600rpm, adding the lead-free antirust pigment and the rest deionized water component, adding the aqueous defoaming agent, the aqueous wetting dispersant and the antifouling agent, adding the film-forming assistant at the rotation speed of 1000 plus one and 1200rpm, continuously dispersing for 25-40 min, measuring the viscosity to be (40 +/-2) s, filtering and discharging to obtain the water-based environment-friendly negative ion anticorrosive paint.
TABLE two compounding ratio of ingredients of comparative example 1
| Composition (I) | Proportioning |
| Aqueous epoxy resin emulsion | 40％ |
| Aqueous polyurethane emulsion | 10％ |
| Aqueous fluororesin emulsion | 5％ |
| Aqueous nano negative ion slurry | 13％ |
| Aqueous wetting dispersant | 1％ |
| Aqueous defoaming agent | 0.5％ |
| Lead-free rust-proof pigment | 10％ |
| Antifouling agent | 0.5％ |
| Film forming aid | 5％ |
| Deionized water | 14％ |
Comparative examples 2 to 3
As shown in Table III, comparative examples 2 to 3 are different from example five in the ratio of raw materials.
Table three raw material ratios of comparative examples 2 to 3
Comparative example 4
This comparative example differs from example 5 in that Bi is added2O3-TiO2The activated carbon is replaced by nano activated carbon with the same quantity.
Comparative example 5
This comparative example differs from example 5 in that the mixed crosslinker was replaced with the same amount of silane crosslinker KH-201.
Comparative example 6
This comparative example differs from example 5 in that it does not contain a hybrid crosslinker.
Comparative example 7
This comparative example differs from example 5 in that it does not contain a bismuth-based-activated carbon photocatalyst.
Comparative example 8
This comparative example differs from example 5 in that it does not contain a negative ion powder.
Performance test
For the samples provided in examples 1 to 13 and comparative examples 1 to 8, the formaldehyde purification efficiency of the samples was examined according to JC/T1074-2008 "indoor air purification function coating material purification performance"; volatile organic compounds of the sample are detected according to GB18582-2008 'Limited amount of harmful substances in interior wall paint of interior decoration and finishing materials', the anticorrosion performance of the sample is detected according to JG/T224-2007 'Steel structure anticorrosion paint for buildings', and the detection results are shown in the fourth table.
TABLE IV Performance test data for examples 1-13 and comparative examples 1-7
By combining examples 1-5 and comparative example 1 and combining table four, it can be seen that compared with comparative example 1, the formaldehyde purification efficiency of examples 1-5 is significantly improved, the volatile organic compounds are reduced to the undetectable level, and the anticorrosive performance is better, which indicates that the anticorrosive paint prepared under the experimental conditions of examples 1-5 has better air purification effect.
As can be seen by combining examples 5-7 and Table IV, the formaldehyde purification efficiency of examples 5-7 is 99% or more, no volatile organic compound can be detected, and the change of the corrosion resistance is small, which indicates that the anticorrosive coatings prepared by the weight ratio of the toluene diisocyanate and the ammonium persulfate in examples 5-7 have good air purification effect.
As can be seen by combining example 5, examples 8 to 9 and comparative example 1 with Table IV, compared with comparative example 1, examples 5 and examples 8 to 9, each had higher formaldehyde purification efficiency and little change in volatile organic compounds and corrosion preventing properties, which indicates that Bi2O3-TiO2Activated carbon and Bi2O3The activated carbon is beneficial to improving the formaldehyde purification efficiency of the anticorrosive paint.
Combining example 5, example 10 and comparative example 1 with table four, it can be seen that the formaldehyde purification efficiency of example 5 and example 10 is higher than that of comparative example 1, which shows that toluene diisocyanate and titanium acetylacetonate both contribute to the improvement of formaldehyde purification efficiency of the anticorrosive coating.
Combining examples 5, 11-13 and table four, it can be seen that examples 11-13 all have better corrosion protection performance than example 5, and example 13 is better, which shows that both the waterborne acrylic and epoxy-terminated silicone contribute to further improving the corrosion protection performance of the corrosion protective coating.
Combining example 5 and comparative examples 2-3 with table four, it can be seen that comparative examples 2-3 have lower formaldehyde purification efficiency and higher volatile organic compounds than example 5, which indicates that the anticorrosive coatings prepared under the conditions of example 5 have better air purification effect.
As can be seen by combining example 5 and comparative examples 4-5, and combining Table IV, the nail of comparative example 4 is comparable to example 5The aldehyde purification efficiency is lower and the volatile organic compounds are higher, which shows that Bi is compared with nano activated carbon2O3-TiO2The air purification effect of the anticorrosive coating is improved better by the activated carbon; the anticorrosive property of comparative example 5 was worse, which shows that the anticorrosive property of the anticorrosive coating was improved better by the mixed crosslinking agent than by the silane crosslinking agent KH-201.
Combining example 5 and comparative examples 6-8 with the fourth table, it can be seen that the formaldehyde purification efficiency of comparative examples 6-8 is lower, the volatile organic compound is higher, and the corrosion resistance is worse than that of example 5, which shows that, when the anion powder, the mixed cross-linking agent and the bismuth-based-activated carbon photocatalyst are simultaneously present, the air purification effect and the corrosion resistance of the prepared corrosion-resistant coating are better.
Claims (7)
1. The negative ion environment-friendly coating is characterized by being prepared from the following raw materials in parts by weight: 50-60 parts of water-based epoxy resin, 9-11 parts of mixed cross-linking agent, 12-14 parts of anion powder, 6.5-8.5 parts of bismuth-based-activated carbon photocatalyst, 2-3 parts of dispersing agent and 70-80 parts of water, wherein the mixed cross-linking agent comprises a cross-linking substance and ammonium persulfate, the weight ratio of the cross-linking substance to the ammonium persulfate is (4-5) to 1, the cross-linking substance is one of toluene diisocyanate or titanium acetylacetonate, and the preparation method of the anion environment-friendly coating comprises the following preparation steps:
s1, uniformly mixing the anion powder, the bismuth-based activated carbon photocatalyst and water according to the proportion to obtain a suspension;
s2, adding the mixed cross-linking agent into the suspension, reacting for 5-8h at 65-75 ℃, and filtering to obtain the bismuth-based-anion-activated carbon composite material;
s3, adding the bismuth-based negative ion-activated carbon composite material and the dispersing agent into the water-based epoxy resin, and uniformly mixing to obtain the negative ion environment-friendly coating.
2. The negative ion environment-friendly coating as claimed in claim 1, wherein: the bismuth-based-activated carbon photocatalyst is Bi2O3Activated carbon or Bi2O3-TiO2One or two of the compositions in the active carbon.
3. The negative ion environment-friendly coating material as claimed in claim 2, wherein: the Bi2O3-TiO2The preparation method of the active carbon comprises the following steps,
(1) uniformly mixing 1-2 parts by weight of tetrabutyl titanate and 3-5 parts by weight of absolute ethyl alcohol to obtain a titanium-containing solution;
(2) under the condition of stirring, adding 1-2 parts by weight of nano activated carbon into a titanium-containing solution, and uniformly mixing to obtain a mixed solution;
(3) uniformly mixing 1-2 parts by weight of 2.5% nitric acid solution and 1-2 parts by weight of absolute ethyl alcohol to obtain a nitric acid alcohol solution;
(4) under the condition of stirring, adding alcohol nitrate solution and 1-2 weight portions of Bi (NO)3)·5H2Adding O into the mixed solution, and stirring for 30-90min to obtain sol;
(5) adding the sol into a hydrothermal reaction kettle, heating the hydrothermal reaction kettle for 22-26h at the temperature of 110-2O3-TiO2Active carbon.
4. The negative ion environment-friendly coating as claimed in claim 1, wherein: the negative ion environment-friendly coating also comprises 4-8 parts by weight of water-based acrylic acid.
5. The negative ion environment-friendly coating as claimed in claim 1, wherein: the negative ion environment-friendly coating also comprises 3-6 parts by weight of epoxy-terminated organosilicon.
6. The negative ion environment-friendly coating as claimed in claim 1, wherein: in the step S1, 4-8 parts by weight of aqueous acrylic acid is also added, and the mixture reacts for 1.5-2.5h at 50-70 ℃ to obtain suspension.
7. The negative ion environment-friendly coating as claimed in claim 1, wherein: in step S3, 3 to 6 parts by weight of an epoxy-terminated silicone is also added.
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